| 摘要 |
A method for extracting methane from coal beds includes creating acoustic, electrical, mechanical and hydrodynamic compressive/tensile stresses by applying periodic short pulses generated via the explosion of a calibrated conductor located in the operating range of a well of a source of oscillations, the energy of which is fed to the coal bed. A slotted perforation is created in the well, said perforation being oriented along the directions of the main stresses in the coal bed, an additional slotted perforation is created in penetrating rock which encompasses the coal bed, and the additional slotted perforation is directed along the directions of the main stresses of the rock encompassing the coal bed, enhancing the acoustic and hydrodynamic cavitation of gas bubbles emitted from the coal, cracks, microcracks, pores, micropores, capillaries and microcapillaries of the coal bed, and also from the cracks and microcracks created in the penetrating rock encompassing the coal bed. The technical result of the proposed method consists in increasing coal methane production, in reducing energy consumption, and in increasing the safety and environmental-friendliness of the process. |
